no wcs grid for DES fits image

[kswang1029]

Describe the bug
This is a user bug report. If we load the image

https://drive.google.com/file/d/1bDbI9-DV-nAssT5bJslAvMOdHWaO7qhJ/view?usp=drive_web

we do not see the wcs grid rendered properly. The console shows errors as

line277: plot = astPlot(wcsinfo, gbox, pbox, args);

If we load the image in ds9 and save as a slice in fits again, then the wcs grid can be rendered successfully in CARTA. For some reason, this trick regulates the fits header.

Let's see if a fix can be applied to handle this case (or not, ie headers fault)

To Reproduce
Steps to reproduce the behavior:

1. download the example image https://drive.google.com/file/d/1bDbI9-DV-nAssT5bJslAvMOdHWaO7qhJ/view?usp=drive_web
2. load it in CARTA and we won't see wcs grid rendered properly.
3. load the image in ds9 and save as a slice
4. load the ds9-processed fits image in CARTA and we will see the wcs grid rendered properly.

Expected behavior
can handle such fits header

Platform info (please complete the following information):

• OS [e.g. macOS Monterey]: macOS ventura
• Browser [e.g. chrome, safari, electron app]: electron app
• Browser version [e.g. 22]:
• Backend branch [e.g. dev, v3b2 release]: v4.1-stable
• Frontend branch [e.g. dev, v3b2 release]: v4.1-stable

[loveluthien]

The problem comes from the file name. If renaming the file with a simpler name, wcs grid works. No need to use ds9 to save it as a new file. It seems that AST has some difficulties to handle complex file name.

[kswang1029]

The problem comes from the file name. If renaming the file with a simpler name, wcs grid works. No need to use ds9 to save it as a new file. It seems that AST has some difficulties to handle complex file name.

Interesting. Any idea on which char causing the problem?

[kswang1029]

The problem comes from the file name. If renaming the file with a simpler name, wcs grid works. No need to use ds9 to save it as a new file. It seems that AST has some difficulties to handle complex file name.

Interesting. Any idea on which char causing the problem?

I guess it is "=" or ","?

[loveluthien]

@kswang1029 yes, it is ",".